期刊论文

中文

水土保持学报

1009-2242

2012

26

5

173-176,181

10.13870/j.cnki.stbcxb.2012.05.023

湖南省研究生科技创新项目

本校为第一机构

为探明长期定位试验条件下不同施肥处理和地下水位对水稻土有机氮组分及其矿化特性的影响,采用Keeney和Bremer酸解法对土壤有机氮进行分组研究,并利用改进后的Warning淹水培养-间歇淋洗法研究水稻土有机氮矿化特性。结果表明,不同处理土壤酸解氮占全氮的61.2%～64.4%,其中酸解未知氮,氨基酸态氮,氨态氮和氨基糖态氮分别占全氮26.9%～34.0%,13.0%～18.0%,12.6%～14.3%和2.3%～4.7%。恒温淹水培养106d后,以酸解未知氮降幅最大,且酸解未知氮与土壤氮矿化势之间有显著的正相关关系（r=0.865＊）,表明酸解未知氮是土壤可矿化态氮的主要贡献者。有机肥处理土壤矿化氮累积量及氮矿化势显著高于化肥处理...

In order to investigate the effects to long-term fertilization and underground water level on fractions of organic N and N mineralization characteristic in paddy soil,acid hydrolysis-distillation method proposed by Keeney and Bremer was adopted to investigate the fractions of organic N,and waterlogging incubation method proposed by Warning was used to investigate N mineralization characteristic.Results show that soil hydrolysable N accounted for 61.2%~64.4% of total N among different treatments,in which hydrolysable unidentified N,amino acid N,...